Gas pipeline leakage automatic closing valve and self-closing valve thereof

Abstract

The utility model discloses an automatic closing valve for gas pipeline leakage and a self-closing valve thereof, and relates to the technical field of structural design of gas self-closing valves. According to the gas pipeline leakage automatic shut-off valve, a vent hole is formed in the middle of a shell, a leather film is connected to the edge of one side of the shell in a sealed mode, a connecting structure is arranged on the edge of the shell, a gas inlet is formed between the connecting structure and the leather film, and the connecting structure is connected with the inner wall of a gas pipeline in a sealed mode. According to the self-closing valve, a timer is arranged on a valve body, a closing device is arranged at the gas inlet end of the valve body, and a gas pipeline leakage automatic closing valve is arranged at the gas outlet end of the valve body. The problem that in the prior art, automatic closing of the gas pipeline can not be achieved when leakage happens to the gas pipeline, and use safety of gas is affected is solved. According to the gas pipeline leakage automatic closing valve and the self-closing valve thereof, when gas leakage occurs, the gas pipeline leakage automatic closing valve can be automatically closed. And through the closing device of the self-closing valve, the action of the closing valve is further ensured, and the effectiveness of leakage closing is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gas self-closing valve structure design, in particular to an automatic closing valve for gas pipeline leakage and a self-closing valve thereof. Background Art

[0002] The pipeline gas self-closing valve is installed on the pipeline of the low-pressure gas system. When the pipeline gas supply pressure is underpressure, overpressure or gas outage, it can automatically close and need to be opened manually without electricity or other external power. Nowadays, with the increasing use of civil gas pipelines, the use of pipeline gas self-closing valves has also increased.

[0003] The utility model patent with application number CN201320521615.X discloses a gas self-closing valve with a leak detection function, in which the function of real-time gas leak detection is achieved by setting a leak detection control unit and cooperating with the self-closing valve. The specific detection method is as follows: since the self-closing valve body is in an open state during normal ventilation, when the gas entering the self-closing valve body is cut off by the leak detection control unit, if the self-closing valve body is converted to a closed state within a short period of time, it means that there is a leak point on the connecting pipe between the gas self-closing valve body and the gas stove, otherwise there is no leak. Although the function of detecting leaks at any time can be achieved, the corrugated rubber membrane structure, an important component that keeps the valve normally open when there is no leak, is fixed. It adapts to the normal gas pressure in the valve cavity to drive the upper armature to separate from the permanent magnet, ensuring that the plug will not block the pipeline under the action of the spring force, thereby achieving the purpose of normal gas supply.

[0004] Chinese invention patent CN202221911320.9 discloses a gas self-closing valve with a leak detection function, comprising a valve seat, a valve cover fixed to the upper surface of the valve seat, a hand-torsion rod rotatably connected to the upper surface of the valve cover, a pipe fixed to the interior of the valve seat, a detection mechanism provided on the outer side of the pipe, and an anti-touch mechanism provided on the detection mechanism. The gas self-closing valve with a leak detection function is provided with a detection mechanism and an anti-touch mechanism. Through the interaction between the detection mechanism and the anti-touch mechanism, a gas pressure sensor detects a gas leak and an alarm component sounds an alarm to provide a prompt. At the same time, the gas self-closing valve is protected by a box body and a cover plate. During the protection, the box body is sealed to ensure that the pressure sensor can accurately detect the leak. The box body and the cover plate are also sealed to prevent the box body from being accidentally opened, thereby improving the sealing effect of the box body and the cover plate.

[0005] However, the existing technology does not have a method that can automatically shut down the gas pipeline when a leak occurs, and can also open the shut-off valve to achieve ventilation under set conditions. This affects the safety of gas use, especially when household gas pipelines are left unused for a long time, and large amounts of accumulated leaks seriously affect safety. Utility Model Content

[0006] In view of this, the main purpose of the utility model is to provide a gas pipeline leakage automatic shut-off valve and a self-closing valve thereof, which can automatically close when a gas leak occurs through the structural design of the shut-off valve to ensure the effectiveness of the leak shut-off.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0008] A gas pipeline leakage automatic shut-off valve comprises: a shell and a membrane; a vent hole is provided in the middle of the shell, the membrane is sealed and connected to the edge of one side of the shell, a connecting structure is provided at the edge of the shell, an air inlet is provided between the connecting structure and the membrane, and the connecting structure is sealed and connected to the inner wall of the gas pipeline.

[0009] In a preferred embodiment, it further includes: a pressure cover, a ventilation cavity is opened inside the shell, the membrane is arranged inside the ventilation cavity, and the membrane is fixedly connected to the edge of the ventilation cavity through the pressure cover.

[0010] In a preferred embodiment, it further includes: a driving component, the driving component is connected to the center of the membrane, one end of the driving component passes through the vent hole, and the other end of the driving component extends out of the center of the gland.

[0011] In a preferred embodiment, the driving assembly includes: a push column, a connecting rod and an extension cylinder; one end of the push column is fixedly connected to the connecting rod, the connecting rod passes through the center of the membrane, and the other side of the connecting rod is fixedly connected to the extension cylinder;

[0012] In a preferred embodiment, the push column passes through the vent hole, and the extension tube extends out of the pressure cover.

[0013] In a preferred embodiment, it further includes: a reset component; the reset component is connected to the gas pipeline, the reset component extends into the gas pipeline to drive the push column, and the push column drives the membrane to slide to the side away from the shell.

[0014] In a preferred embodiment, the reset assembly includes: a pushing bent rod and a downward pressing assembly, the downward pressing assembly is fixedly connected to the outer wall of the gas pipeline, the lower end of the downward pressing assembly extends into the interior of the gas pipeline, the pushing bent rod is hinged to the end of the shell, the downward pressing assembly presses down to push the pushing bent rod, and the other end of the pushing bent rod drives the pushing column.

[0015] In a preferred embodiment, an extension shell extends out from one end of the shell away from the membrane, the upper side of the extension shell is open, and the two sides of the opening are hinged to the pushing bent rod.

[0016] In a preferred embodiment, the down-pressure assembly includes: a down-pressure shell, a down-pressure rod, a support spring and a connecting cylinder, the connecting cylinder passes through the gas pipeline, the outer wall of the connecting cylinder is sealed and connected to the gas pipeline, the interior of the connecting cylinder is slidingly and sealingly connected to the down-pressure rod, the upper end of the down-pressure rod is fixedly connected to the down-pressure shell, and the support spring is supported and connected between the down-pressure shell and the connecting cylinder;

[0017] In a preferred embodiment, the pressing rod extends into the interior of the gas pipeline along the connecting tube, and the lower end of the pressing rod pushes the pushing bent rod to rotate.

[0018] A self-closing valve comprises: a valve body, a timer and a closing device; the valve body is provided with a timer, the air inlet end of the valve body is provided with the closing device, and the air outlet end of the valve body is provided with the above-mentioned automatic closing valve for gas pipeline leakage.

[0019] In a preferred embodiment, the closing device comprises: a first magnetic member, a second magnetic member, a rotating rod and a closing cover; the first magnetic member is fixedly connected to the rotating shell of the timer (03), the rotating rod is hinged on the valve body, one end of the rotating rod extends into the interior of the valve body, and the other end of the rotating rod is fixedly connected to the second magnetic member, so that the first magnetic member attracts the second magnetic member to pull the rotating rod, and the closing cover closes the gas pipeline;

[0020] In a preferred embodiment, it further comprises: a sealing cover, which is provided on the upper side of the rotating rod and the second magnetic member, and the sealing cover is sealed to the outer wall of the gas pipeline.

[0021] The utility model of the automatic shut-off valve for gas pipeline leakage and the self-closing valve thereof have the following beneficial effects:

[0022] This gas pipeline leak automatic shut-off valve comprises a housing and a membrane. The housing has a vent hole in the middle, a side edge of the housing sealably connected to the membrane, a connecting structure is provided on the housing edge, an air inlet is provided between the connecting structure and the membrane, and the connecting structure is sealed to the inner wall of the gas pipeline. This self-closing valve comprises a valve body, a timer, and a closing device. The valve body is provided with a timer, the closing device is provided at the air inlet end of the valve body, and the aforementioned gas pipeline leak automatic shut-off valve is provided at the air outlet end of the valve body.

[0023] The existing technology does not have a method to automatically shut down the gas pipeline when a leak occurs, and under set conditions, the shut-off valve can also be opened to achieve ventilation. This affects the safety of gas use, especially when household gas pipelines are left unused for a long time and a large amount of accumulated leakage seriously affects safety.

[0024] The gas pipeline leakage automatic shut-off valve and the self-closing valve thereof can automatically close when a gas leak occurs due to the structural design of the shut-off valve. The closing device of the self-closing valve further ensures the operation of the shut-off valve and the effectiveness of the leak closure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a structural schematic diagram of an automatic shut-off valve for gas pipeline leakage according to an embodiment of the present disclosure;

[0027] Figure 2 is a cross-sectional view of an automatic shut-off valve for gas pipeline leakage according to one embodiment of the present disclosure;

[0028] Figure 3 Schematic diagram of the structure of a closing device of a self-closing valve according to an embodiment of the present disclosure;

[0029] Figure 4 Schematic diagram of the structure of a self-closing valve according to an embodiment of the present disclosure;

[0030] Figure 5 is a cross-sectional view of a self-closing valve according to one embodiment of the present disclosure;

[0031] Figure 6 for Figure 5A partial enlarged view of point A of a self-closing valve according to an embodiment of the present disclosure is shown.

[0032]

Main component symbol description

[0033] 01. Gas pipeline; 02. Valve body; 03. Timer;

[0034] 1. Shell;

[0035] 11. Connecting structure; 12. Ventilation cavity; 13. Extension shell; 14. Opening;

[0036] 2. Skin membrane;

[0037] 3. Air intake;

[0038] 4. Gland;

[0039] 5. Drive components;

[0040] 51. Push column; 52. Connecting rod; 53. Extension tube;

[0041] 6. Reset components;

[0042] 61. Push the bent rod; 62. Press down the assembly;

[0043] 71. Lower pressure shell; 72. Lower pressure rod; 73. Support spring; 74. Connecting tube;

[0044] 8. Turn off the device;

[0045] 81. First magnetic member; 82. Second magnetic member; 83. Rotating rod; 84. Closing cover;

[0046] 9. Sealing cover. DETAILED DESCRIPTION

[0047] The following is a further detailed description of the gas pipeline leakage automatic shut-off valve and the self-closing valve of the present invention in conjunction with the accompanying drawings and embodiments of the present invention.

[0048] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] like Figures 1-6 As shown, this automatic shut-off valve for gas pipeline leaks comprises a housing 1 fixedly connected to the exterior of the gas pipeline 01; and a membrane 2 that automatically closes the vent hole in the housing 1. To achieve both gas flow and shutoff, the housing 1 has a vent hole in the center. The membrane 2 is sealed to one side of the housing 1, and a connecting structure 11 is provided on the edge of the housing 1. An air inlet 3 is provided between the connecting structure 11 and the membrane 2. The connecting structure 11 is sealed to the inner wall of the gas pipeline 01. The valve closes the gas flow through the tight seal between the membrane 2 and the edge of the vent hole.

[0053] A sealing convex ring is provided on the membrane 2 near the edge of the vent hole, and the sealing convex ring and the housing 1 are close together to achieve sealing or ventilation. Further preferably, a sealing ring groove is provided on the edge of the vent hole, and the sealing convex ring is adapted to extend into the sealing ring groove, thereby achieving a better sealing effect of the membrane.

[0054] In a preferred embodiment, the connection structure 11 is a threaded structure provided on the outer wall of the housing 1 .

[0055] To ensure a more stable connection between the membrane 2 and the shell 1 and ensure connection strength, the system further includes: a gland 4 for compressing and securing the membrane 2. A vent cavity 12 is defined within the shell 1, with the membrane 2 positioned within it. The gland 4 secures the membrane 2 at the edge of the vent cavity 12. The membrane 2 is movable within the vent cavity 12, ensuring that the membrane 2 seals the vent hole during movement, or that the membrane is spaced away from the vent hole, allowing gas to pass through the vent hole.

[0056] To push the membrane 2 and close the vent, an external drive mechanism can be used to push the membrane 2 and thereby open the shutoff valve. The device also includes a drive assembly 5 for driving the membrane 2. The drive assembly 5 is connected to the center of the membrane 2, with one end extending through the vent and the other end extending out of the center of the gland 4. The external structure drives the drive assembly 5, pushing the membrane 2 away from the housing 1, thereby opening the shutoff valve.

[0057] To achieve a coordinated connection with the membrane 2 and ensure structural rationality, the drive assembly 5 comprises a push post 51 for coordinated propulsion, a connecting rod 52 that passes through the membrane 2, and an extension tube 53 that extends from the other side of the membrane 2 through the gland 4. One end of the push post 51 is fixedly connected to the connecting rod 52, which passes through the center of the membrane 2. The other end of the connecting rod 52 is fixedly connected to the extension tube 53. The large push post 51 and extension tube 53 provide a tight pressure on both sides of the membrane 2, ensuring that the drive assembly 5 can drive the membrane 2 during operation.

[0058] In order to facilitate the driving action of the external reset assembly 6 , the push column 51 passes through the vent hole and the extension tube 53 extends out of the pressure cover 4 .

[0059] In order to enable the shut-off valve to be opened through the external structure after closing, the device further comprises: a reset assembly 6 for pushing the push column 51; the reset assembly 6 is connected to the gas pipeline 01, extends into the gas pipeline 01, and drives the push column 51, which drives the diaphragm 2 to slide away from the housing 1.

[0060] This further ensures the rationality of the structure, especially by converting movement perpendicular to the length of the gas pipeline 01 into movement parallel to the gas pipeline 01. The reset assembly 6 comprises a push rod 61 and a downward pressure assembly 62. The downward pressure assembly 62 is fixedly connected to the outer wall of the gas pipeline 01, with the lower end of the downward pressure assembly 62 extending into the interior of the gas pipeline 01. The push rod 61 is hinged to the end of the housing 1. The downward pressure assembly 62 pushes the push rod 61 downward, and the other end of the push rod 61 drives the push column 51. The design of the push rod 61 ensures that the vertical movement of the downward pressure assembly 62 is converted into horizontal movement, satisfying the requirement for horizontal actuation of the push column 51 and opening of the shut-off valve.

[0061] To facilitate the connection of the push rod 61, ensure that the push rod 61 can rotate, and satisfy the driving function of the push column 51, the end of the housing 1 away from the membrane 2 extends outward from the extension shell 13. The upper side of the extension shell 13 has an opening 14, and the two sides of the opening 14 are hinged to the push rod 61. The design of the opening 14 ensures sufficient rotation space for the push rod 61.

[0062] In order to realize the downward pressing action of the downward pressing assembly 62 and ensure that it rebounds to the restored position after the downward pressing, and avoid affecting the interference of the push column 51 during the leakage closing process, the downward pressing assembly 62 includes: a downward pressing shell 71 for facilitating the pressing action, a downward pressing rod 72 for pressing the push bent rod 61 downward, a support spring 73 for supporting the downward pressing shell 71 to restore its position, and a connecting tube 74 that supports the support spring 73 to meet the requirements of resetting the downward pressing shell 71. The connecting tube 74 passes through the gas pipeline 01, the outer wall of the connecting tube 74 is sealed with the gas pipeline 01, the interior of the connecting tube 74 is slidably and sealedly connected to the downward pressing rod 72, the upper end of the downward pressing rod 72 is fixedly connected to the downward pressing shell 71, and the support spring 73 is supported and connected between the downward pressing shell 71 and the connecting tube 74; each time the downward pressing shell 71 is pressed down to drive the downward pressing rod 72 to realize the downward pressing action, the support of the support spring 73 can ensure that the downward pressing shell 71 is restored to its original position, meeting the requirements of resetting the downward pressing shell 71.

[0063] Of course, in order to realize the action of the push column 51, the push rod 72 extends into the gas pipeline 01 along the connecting tube 74, and the lower end of the push rod 72 pushes the push rod 61 to rotate. Thereby, the diaphragm 2 is driven, and the closing valve is opened.

[0064] A self-closing valve comprises: a valve body 02, a timer 03, and a closing device 8. The timer 03 is provided on the valve body 02, the closing device 8 is provided at the air inlet end of the valve body 02, and the aforementioned automatic shut-off valve for gas pipeline leaks is provided at the air outlet end of the valve body 02. By cooperating with the closing device 8, when the self-closing valve leaks, the pipeline is disconnected from the gas supply pipeline. This prevents excessive gas pressure at the gas supply end from affecting the closing action of the shut-off valve when a leak occurs.

[0065] To cooperate with timer 03 to achieve timed gas pipeline closure and disconnection, the closing device 8 comprises a first magnetic member 81, a second magnetic member 82, a rotating rod 83, and a closing cover 84. The first magnetic member 81 is fixedly connected to the rotating housing of timer 03, and the rotating rod 83 is hinged to the valve body 02. One end of the rotating rod 83 extends into the interior of the valve body 02, and the other end of the rotating rod 83 is fixedly connected to the second magnetic member 82. When the first magnetic member 81 attracts the second magnetic member 82, the rotating rod 83 is pulled, and the closing cover 84 closes the gas pipeline 01.

[0066] The system further comprises a sealing cover 9 made of non-magnetic material. The sealing cover 9 covers the upper side of the rotating rod 83 and the second magnetic member 82, and the sealing cover 9 is sealed to the outer wall of the gas pipeline 01. This ensures that the entire rotating rod and the second magnetic member can operate within the sealing cover 9, preventing gas leakage.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A gas pipeline leakage automatic shut-off valve, characterized in that: include: A shell (1) and a membrane (2); a vent hole is provided in the middle of the shell (1); the membrane (2) is sealed and connected to the edge of one side of the shell (1); a connecting structure (11) is provided at the edge of the shell (1); an air inlet (3) is provided between the connecting structure (11) and the membrane (2); and the connecting structure (11) is sealed and connected to the inner wall of the gas pipeline (01).

2. The gas pipeline leakage automatic shut-off valve according to claim 1, characterized in that: Also includes: A pressure cover (4) is provided with a ventilation cavity (12) inside the shell (1), the membrane (2) is provided inside the ventilation cavity (12), and the membrane (2) is fixedly connected to the edge of the ventilation cavity (12) through the pressure cover (4).

3. The gas pipeline leakage automatic shut-off valve according to claim 2, characterized in that: Also includes: A drive assembly (5), wherein the drive assembly (5) is connected to the center of the membrane (2), one end of the drive assembly (5) passes through the vent hole, and the other end of the drive assembly (5) extends out of the center of the gland (4).

4. The automatic shut-off valve for gas pipeline leakage according to claim 3, characterized in that: The driving assembly (5) comprises: a pushing column (51), a connecting rod (52) and an extension tube (53); one end of the pushing column (51) is fixedly connected to the connecting rod (52), the connecting rod (52) passes through the center of the membrane (2), and the other side of the connecting rod (52) is fixedly connected to the extension tube (53); The pushing column (51) passes through the vent hole, and the extending tube (53) extends out of the pressure cover (4).

5. The automatic shut-off valve for gas pipeline leakage according to claim 4, characterized in that: Also includes: A reset component (6); the reset component (6) is connected to the gas pipeline (01), and the reset component (6) extends into the gas pipeline (01) to drive the push column (51), and the push column (51) drives the membrane (2) to slide toward the side away from the shell (1).

6. The gas pipeline leakage automatic shut-off valve according to claim 5, characterized in that: The reset assembly (6) includes: a pushing bent rod (61) and a pressing assembly (62), wherein the pressing assembly (62) is fixedly connected to the outer wall of the gas pipeline (01), and the lower end of the pressing assembly (62) extends into the interior of the gas pipeline (01), and the pushing bent rod (61) is hinged to the end of the shell (1). The pressing assembly (62) presses down to push the pushing bent rod (61), and the other end of the pushing bent rod (61) drives the pushing column (51).

7. The automatic shut-off valve for gas pipeline leakage according to claim 6, characterized in that: An extension shell (13) extends from one end of the shell (1) away from the membrane (2), and an upper side opening (14) of the extension shell (13) is formed, and the two sides of the opening (14) are hingedly connected to the push bent rod (61).

8. The gas pipeline leakage automatic shut-off valve according to claim 6, characterized in that: The down-pressing assembly (62) includes: a down-pressing shell (71), a down-pressing rod (72), a support spring (73) and a connecting tube (74); the connecting tube (74) passes through the gas pipeline (01); the outer wall of the connecting tube (74) is sealed and connected to the gas pipeline (01); the interior of the connecting tube (74) is slidingly and sealingly connected to the down-pressing rod (72); the upper end of the down-pressing rod (72) is fixedly connected to the down-pressing shell (71); and the support spring (73) is supported and connected between the down-pressing shell (71) and the connecting tube (74); The pressing rod (72) extends into the interior of the gas pipeline (01) along the connecting tube (74), and the lower end of the pressing rod (72) pushes the pushing bent rod (61) to rotate.

9. A self-closing valve, characterized in that: include: A valve body (02), a timer (03) and a closing device (8); the valve body (02) is provided with a timer (03), the closing device (8) is provided at the air inlet end of the valve body (02), and the gas pipeline leakage automatic closing valve according to any one of claims 1 to 8 is provided at the air outlet end of the valve body (02).

10. The self-closing valve according to claim 9, characterized in that: The closing device (8) comprises: a first magnetic member (81), a second magnetic member (82), a rotating rod (83) and a closing cover (84); the first magnetic member (81) is fixedly connected to the rotating shell of the timer (03), the rotating rod (83) is hinged on the valve body (02), one end of the rotating rod (83) extends into the interior of the valve body (02), and the other end of the rotating rod (83) is fixedly connected to the second magnetic member (82), so that the first magnetic member (81) attracts the second magnetic member (82) to pull the rotating rod (83), and the closing cover (84) closes the gas pipeline (01); It also includes a sealing cover (9), the sealing cover (9) is provided on the upper side of the rotating rod (83) and the second magnetic attraction member (82), and the sealing cover (9) is sealedly connected to the outer wall of the gas pipeline (01).

Images